diff --git a/package.json b/package.json
index 6d92969..f7c6361 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "hubot-slack-utils": "0.0.5",
     "hubot-slack-whitelist-middleware": "^1.0.1",
     "hubot-youtube": "^1.0.2",
-    "lodash": "^4.17.19",
+    "lodash": "^4.17.21",
     "moment": "^2.19.3"
   },
   "scripts": {
diff --git a/yarn.lock b/yarn.lock
index 72a3ae7..62226df 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -831,9 +831,9 @@ lodash@^3.10.1:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4.13.1, lodash@^4.17.19:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
+lodash@^4.13.1, lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 log@1.4.0:
   version "1.4.0"